Robust Video Coding over Wireless Channels Using TRIRF Inter-Frame Coding

1 Introduction Present-day video coding techniques are very efficient in compressing data, but they are also highly sensitive to transmission errors. To exploit existing temporal redun- dancy, predictive coding is used, where the current frame is coded as a difference signal with respect to a reference frame. Usually the previously reconstructed frame serves as the reference frame, both at the transmitter and the receiver. However, when there are channel errors present in the receiver's reference frame, the current frame can- not be correctly reconstructed, because the difference sig- nal is calculated from the uncorrupted transmitter refer- ence. Errors occurring in one frame will therefore prop- agate to the following frames. If motion compensation is used in prediction, errors occurring in one spatial po-\Lambd